Add Built with Cloudflare button (#25066)

* Add Built with Cloudflare button

This PR adds a page with usage guides for the "Built with Cloudflare" button.

* Update path, add changelog entry

* Updated copy

Author: kristianfreeman

src/content/changelog/workers/2025-09-10-built-with-cloudflare-button.mdx

@@ -0,0 +1,13 @@
+---
+title: Built with Cloudflare button
+description: Our new "Built with Cloudflare" button can be used to share your stack of choice with the world.
+products:
+  - workers
+date: 2025-09-10
+---
+
+We've updated our "Built with Cloudflare" button to make it easier to share that you're building on Cloudflare with the world. Embed it in your project's README, blog post, or wherever you want to let people know.
+
+![Built with Cloudflare](https://workers.cloudflare.com/built-with-cloudflare.svg)
+
+Check out the [documentation](/workers/platform/built-with-cloudflare) for usage information.

src/content/docs/workers/platform/built-with-cloudflare.mdx

@@ -0,0 +1,46 @@
+---
+title: Built with Cloudflare button
+pcx_content_type: concept
+sidebar:
+  order: 6
+head: []
+description: Set up a Built with Cloudflare button
+---
+
+import { WranglerConfig } from "~/components";
+import { Tabs, TabItem } from "@astrojs/starlight/components";
+
+If you're building an application or website on Cloudflare, you can embed a Built with Cloudflare button in your README, blog post, or documentation.
+
+![Built with Cloudflare](https://workers.cloudflare.com/built-with-cloudflare.svg)
+
+:::note[Disambiguation]
+
+The "Built with Cloudflare" button can be used to share that you're using Cloudflare products on your website or application. If you want people to be able to deploy your application on their own account, refer to [Deploy to Cloudflare buttons](/workers/platform/deploy-buttons).
+
+:::
+
+## How to Set Up Built with Cloudflare button
+
+The Built with Cloudflare button is an SVG and can be embedded anywhere. Use the following snippet to paste the button into your README, blog post, or documentation.
+
+<Tabs syncKey="BuiltWithCloudflareButtonSnippet">
+<TabItem label="Markdown">
+```md
+[![Built with Cloudflare](https://workers.cloudflare.com/built-with-cloudflare.svg)](https://cloudflare.com)
+```
+
+</TabItem>
+<TabItem label="HTML">
+```html
+<a href="https://cloudflare.com"><img src="https://workers.cloudflare.com/built-with-cloudflare.svg" alt="Built with Cloudflare"/></a>
+```
+
+</TabItem>
+
+<TabItem label="URL">
+```
+https://workers.cloudflare.com/built-with-cloudflare.svg
+```
+</TabItem>
+</Tabs>